/*
 * Copyright [2013-2021], Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.polardbx.optimizer.partition.datatype;

import com.alibaba.polardbx.optimizer.core.datatype.DataType;
import com.alibaba.polardbx.optimizer.core.field.DateField;
import com.google.common.base.Preconditions;

public class DatePartitionField extends AbstractPartitionField {

    protected DatePartitionField(DataType<?> fieldType) {
        field = new DateField(fieldType);
    }

    @Override
    public int compareTo(PartitionField toCmp) {
        Preconditions.checkArgument(mysqlStandardFieldType() == toCmp.mysqlStandardFieldType());
        byte[] left = field.rawBytes();
        byte[] right = toCmp.rawBytes();

        int leftVal = ((DateField) field).readFromBinary(left);
        int rightVal = ((DateField) ((AbstractPartitionField) toCmp).field).readFromBinary(right);

        return leftVal < rightVal ? -1
            : ((leftVal > rightVal) ? 1 : 0);
    }
}
